#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code tab[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,
0x82,0xf8,0x80,0x90,0xff}; //0,1,2,3,4,5,6,7,8,9,关显示
uchar b,d,t; //定义变量
uchar fen=10,miao=0; //定时初始时间变量
uchar flag; //标志位
uchar temp; //矩阵键盘键值
sbit beep = P1^7; //蜂鸣器
P2;=0xff;我有这句吗
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